<![CDATA[Trichoderma spp is a cosmopolitan ground fungus. Trichoderma is a soil saprophyte fungus is advantageous for plants. Several species of Trichoderma indicate having the ability as a bio-fertilizer so as to help plant growth. This research was conducted at the Laboratory of Faculty of Agriculture Faculty of University of Tanjungpura Pontianak for 7 months. The exploration is done from rhizosphere rice tidal rice which is considered fertile, less fertile and irrigation channel. Isolation using dilution casting method. Dilution rate is 10-1,10-2,10-3,10-4. Each Trichoderma isolate is tested for its ability as a biological fertilizer such as dissolving phosphate, dissolving potassium, degrading cellulose, producing IAA. Isolates classified as superior tested hypovirulen seed cucumber. Exploration results obtained by 38 isolates Trichoderma spp. Based on solvent test of phosphate isolate TRTS6 has the highest potential with solvent index of 72%. In subsequent tests Trichoderma was not found to dissolve K, degrade cellulose or produce IAA. Trichoderma spp species found from exploratory results include T. harzianum, T. auoreoviride, T. hamatum, T. psudokoningii T. koningii, T. koningii sp. Calculation of Disease Severity Index (DSI) in hypovirulent test 5 potential isolates inoculated on cucumber plant showed 0% value. Type of Trichoderma harzianum (TSTS6) is a recommended as a fungus that can be used as a bilogical fertilizer in dissolving phospate. Key words: Cosmopolitan, exploration, saprofit fungi, Trichoderma.]]>
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